JPH0639763Y2 - Groundwater filtration equipment - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to groundwater for efficiently allowing rainwater to re-penetrate into the ground as groundwater while filtering and allowing it to flow into a groundwater layer. The present invention relates to a filtration device.

<Prior art> Normally, rainwater is generally discharged from drainage channels to rivers and the sea, and it is less likely to seep into the ground as groundwater, especially when the road surface is fully paved in urban areas. . Where
This reduction of groundwater has many adverse effects in various respects.

In other words, as a result of the low penetration rate of rainwater into the ground, changes in temperature and humidity, for example, change subtle natural forms, especially when groundwater decreases, it adversely affects the growth of trees and The living environment of was also destroyed.

In urban areas, a large amount of water supply used for removing water from roadside trees and roads, flush toilets, car washes, air conditioning, industrial use, etc. is being consumed as forests of high-rise buildings become more densely populated. However, since most of them are used for non-drinks, the use of water supply is extremely uneconomical. Water for such uses does not need to use disinfected water supply like drinking water, and groundwater is sufficient, but pumping a large amount of groundwater is also a cause of ground subsidence, and in the first place, As mentioned above, groundwater itself is decreasing.

In this way, the water consumed in urban areas is not necessarily water supply, but it is also uneconomical due to insufficient supply of demand, and in the case of water shortage, there is limited use for drinking. When used as, it would not interfere with the general daily life.

Furthermore, in urban areas with fully paved roads, it is seemingly rational and functional to discharge rainwater into drains from rivers, but on the other hand, local heavy rainfall during the rainy season causes flooding of rivers. However, it causes flooding, which is a serious social problem. This is because most of the rainwater does not penetrate into the ground and flows into artificial underdrains, sewers, and rivers.

<Problems to be solved by the invention> With respect to this point, there is provided a water purification device which is provided with an underground water tank for reusing rainwater, takes in rainwater, and purifies this rainwater by crushed stones for reuse. It is thought that even in urban areas, rainwater contains a large amount of sediment and fine dust, and if this sediment is deposited together with rainwater on the bottom of the water tank, the water will be sufficiently purified. It was not carried out, and the volume of the water tank itself was reduced, and it did not function effectively.

On the other hand, a method of simply excavating the vertical shaft to the groundwater layer and directly injecting rainwater on the pavement surface is also considered. This method is extremely effective in suppressing flooding of rivers, for example, but there remains a problem in purifying groundwater.

That is, as is well known, groundwater can be pumped up and used as drinking water because rainwater permeates into the ground and is filtered and purified in the ground before reaching the groundwater layer. Therefore,
Pouring rainwater directly into the groundwater layer is not desirable from a hygienic point of view.

Even if a vertical shaft is opened, problems such as earth retaining and excavation methods remain.

<Means for Solving Problems> The present invention is a groundwater filtering device devised to solve the above-mentioned conventional drawbacks and inconveniences, and is a cylindrical body buried in the ground, and the upper end of the cylindrical body is Is a hollow intruding tube part having a large number of intrusion holes through which water in the ground penetrates, a lower part of the intruding tube part is a filtering tube part in which gravel, sand, charcoal, etc. are laminated, The lower part is a hollow discharge cylinder part having a large number of discharge holes for discharging the water that has passed through the filter cylinder part into the ground again, and the lower end of the discharge cylinder part has a sharpened shape and a screw blade for excavation on the outer peripheral surface. And a cover plate exposed on the ground surface is attached to the upper end of the intruding cylinder.

<Operation> In the above-described configuration, rainwater enters the hollow intrusion cylinder through the holes in the cover plate exposed on the surface of the earth or a large number of intrusion holes formed in the intrusion cylinder, and the gravel of the filtration cylinder, It is filtered by passing through sand, charcoal, etc., especially deodorized by charcoal.

Then, the water that has passed through the filter cylinder is again discharged into the ground through the large number of discharge holes of the discharge cylinder, and is stored in the groundwater layer.

Further, since the lower end portion of the tubular body which constitutes the whole is a sharpened shape and is an excavation portion in which a screw blade for excavation is provided around the outer peripheral surface, the excavation function can be achieved by mounting it on a predetermined shaft rotating machine tool. Therefore, it becomes possible to easily bury it in the ground.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

First, the cylindrical tubular body 1 that constitutes the entire groundwater filtering apparatus of the present invention may be an integrated body or a connected body.
It has a diameter of about cm and a length of about 7 m, and is molded from an alloy, a hard synthetic resin, concrete, etc. and buried in the ground.

A cover plate 2 similar to a manhole cover is mounted on the open upper end of the cylindrical body 1 so as to be exposed on the surface of the earth, and a large number of small holes 3 through which rainwater and the like enter the inside of the cover plate 2 are opened. It has been done.

An upper end portion of the tubular body 1 is a hollow intrusion tubular portion 4 having a length of about 4 m, and a large number of intrusion holes 5 into which underground water intrudes are formed in the tubular wall. The diameter of the penetration hole 5 is about 1 to 2 mm.

Next, a filtration cylinder 6 having a length of about 1 m continues below the intrusion cylinder 4.

Gravel 7, sand 8, charcoal 9, and gravel 7 are stacked and stored in this order from the top in the filtration cylinder part 6, and at least at the lower end of the filtration cylinder part 6, these laminates are A mesh material (not shown) is arranged so as not to shift the falling position.

Therefore, the rainwater that has flowed into the intruding tube portion 4 is filtered by the gravel 7, the sand 8 and the like, deodorized by the charcoal 9, and then descends through the filtering tube portion 6.

Next, a hollow discharge cylinder portion 10 continues below the filtration cylinder portion 6. A large number of discharge holes 11 having a diameter of about 2 mm are formed in the cylinder wall of the discharge cylinder section 10, and the water that has passed through the filtration cylinder section 6 is discharged again into the ground, and the discharged water is It leaches into the groundwater layer and is stored.

Then, the lower end of the discharge cylinder portion 10 is made into a sharpened shape and is an excavation portion 12 in which screw blades 13 for excavation are provided around the outer peripheral surface.

The cylindrical tubular body 1 of the present invention has a length of about 7 m, but a diameter of about 25 cm. Therefore, if integrally constructed, the entire tubular body 1 is axially rotated and the excavation section 12 Screw feather
13 will move forward while excavating the soil, and the whole can be easily buried in the ground.

<Effects of the Invention> In short, according to the present invention, rainwater can be purified and deodorized and stored as groundwater for effective use, and the natural environment in urban areas can be balanced, and rainwater can be used. The device can be used semi-permanently, it is economical from both the viewpoint of the device and the use of rainwater, and not only the structure is simple, but also the efficiency of the burial work is good, and many excellent actions are taken. Have an effect.

[Brief description of drawings]

The drawings are sectional views showing an embodiment of the present invention. Explanation of reference numerals 1 ... Cylinder body, 2 ... Lid plate, 4 ... Intrusion cylinder portion, 5 ... Intrusion hole, 6 ... Filtration cylinder portion, 7 ... Gravel, 8 ... Sand, 9 ... Charcoal, 10 …… Discharge tube part, 11 …… Discharge hole, 12 …… Excavation part, 13
...... Screw feather.

Claims (1)

[Scope of utility model registration request] 1. A cylindrical body (1) which is buried in the ground, wherein the upper end of the cylindrical body (1) has a large number of penetration holes (5) through which water in the ground penetrates. Invasion cylinder part (4), a filtration cylinder part (6) in which gravel (7), sand (8), charcoal (9), etc. are laminated under the invasion cylinder part (4), and the filtration cylinder part (6) ) Is a hollow discharge cylinder part (10) having a large number of discharge holes (11) for discharging the water passing through the filter cylinder part (6) into the ground again, and the lower end of the discharge cylinder part (10). Is a sharpened shape, and an excavation portion (12) having an outer peripheral surface provided with screw blades (13) for excavation, and a lid plate (2) exposed to the surface of the earth at the upper end of the intruding cylinder portion (4). Groundwater filtering device that is installed.